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// Copyright (c) 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/skia_runner/in_process_graphics_system.h"
#include <iostream>
#include "base/lazy_instance.h"
#include "base/memory/discardable_memory.h"
#include "base/memory/discardable_memory_allocator.h"
#include "base/thread_task_runner_handle.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/command_buffer/client/gles2_lib.h"
#include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/skia/include/gpu/gl/GrGLInterface.h"
namespace {
// TODO(hendrikw): Replace TestDiscardableMemoryAllocator and move to base?
class NonDiscardableMemory : public base::DiscardableMemory {
public:
explicit NonDiscardableMemory(size_t size) : data_(new uint8_t[size]) {}
bool Lock() override { return false; }
void Unlock() override {}
void* data() const override { return data_.get(); }
private:
scoped_ptr<uint8_t[]> data_;
};
class NonDiscardableMemoryAllocator : public base::DiscardableMemoryAllocator {
public:
// Overridden from DiscardableMemoryAllocator:
scoped_ptr<base::DiscardableMemory> AllocateLockedDiscardableMemory(
size_t size) override {
return make_scoped_ptr(new NonDiscardableMemory(size));
}
};
// Singleton used to initialize and terminate the gles2 library.
class GLES2Initializer {
public:
GLES2Initializer() { gles2::Initialize(); }
~GLES2Initializer() { gles2::Terminate(); }
private:
DISALLOW_COPY_AND_ASSIGN(GLES2Initializer);
};
base::LazyInstance<GLES2Initializer> g_gles2_initializer =
LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<NonDiscardableMemoryAllocator> g_discardable;
} // namespace anonymous
namespace skia_runner {
void BindContext3DGLContextCallback(const GrGLInterface* gl_interface) {
gles2::SetGLContext(reinterpret_cast<gpu::GLInProcessContext*>(
gl_interface->fCallbackData)->GetImplementation());
}
InProcessGraphicsSystem::InProcessGraphicsSystem() {
base::DiscardableMemoryAllocator::SetInstance(&g_discardable.Get());
g_gles2_initializer.Get();
if (!gfx::GLSurface::InitializeOneOff()) {
LOG(ERROR) << "Unable to initialize gfx::GLSurface.";
return;
}
// Create the in process context.
in_process_context_ = CreateInProcessContext();
if (!in_process_context_) {
LOG(ERROR) << "Unable to create in process context.";
return;
}
// Create and set up skia's GL bindings.
gles2::SetGLContext(in_process_context_->GetImplementation());
GrGLInterface* bindings = skia_bindings::CreateCommandBufferSkiaGLBinding();
if (!bindings) {
LOG(ERROR) << "Unable to create skia command buffer bindings.";
return;
}
bindings->fCallback = BindContext3DGLContextCallback;
bindings->fCallbackData =
reinterpret_cast<GrGLInterfaceCallbackData>(in_process_context_.get());
// Create skia's graphics context.
gr_context_ = skia::AdoptRef(GrContext::Create(
kOpenGL_GrBackend, reinterpret_cast<GrBackendContext>(bindings)));
if (!gr_context_) {
LOG(ERROR) << "Unable to create skia graphics context.";
return;
}
// Set skia's graphics context cache size.
const int kMaxGaneshResourceCacheCount = 2048;
const size_t kMaxGaneshResourceCacheBytes = 96 * 1024 * 1024;
gr_context_->setResourceCacheLimits(kMaxGaneshResourceCacheCount,
kMaxGaneshResourceCacheBytes);
}
InProcessGraphicsSystem::~InProcessGraphicsSystem() {
}
bool InProcessGraphicsSystem::IsSuccessfullyInitialized() const {
return gr_context_;
}
int InProcessGraphicsSystem::GetMaxTextureSize() const {
int max_texture_size = 0;
in_process_context_->GetImplementation()->GetIntegerv(GL_MAX_TEXTURE_SIZE,
&max_texture_size);
return max_texture_size;
}
scoped_ptr<gpu::GLInProcessContext>
InProcessGraphicsSystem::CreateInProcessContext() const {
const bool is_offscreen = true;
const bool share_resources = true;
gpu::gles2::ContextCreationAttribHelper attribs;
attribs.alpha_size = 8;
attribs.blue_size = 8;
attribs.green_size = 8;
attribs.red_size = 8;
attribs.depth_size = 24;
attribs.stencil_size = 8;
attribs.samples = 0;
attribs.sample_buffers = 0;
attribs.fail_if_major_perf_caveat = false;
attribs.bind_generates_resource = false;
gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
scoped_ptr<gpu::GLInProcessContext> context =
make_scoped_ptr(gpu::GLInProcessContext::Create(
nullptr, nullptr, is_offscreen, gfx::kNullAcceleratedWidget,
gfx::Size(1, 1), nullptr, share_resources, attribs, gpu_preference,
gpu::GLInProcessContextSharedMemoryLimits(), nullptr, nullptr));
DCHECK(context);
return context.Pass();
}
} // namespace skia_runner
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